.form__submit{
  width: 100%;
  padding: 0;
  min-height: 46px;
  margin: 30px auto 0;
  background-color: #000;
  box-sizing: border-box;
  border: none;
  outline: none;
  border-radius: 2px;
  font-style: normal;
  font-weight: 400;
  font-size: 14px;
  line-height: 17px;
  text-align: center;
  color: #FFFFFF;
  cursor: pointer;
}

.form__submit:hover{
  opacity: .8;
}

@media screen and (min-width: 880px) {
  .form__submit{
    font-size: 18px;
    line-height: 22px;
    min-height: 50px;
  }
}